Crews have been performing routine maintenance on the historic Boji Tower, 124 W. Allegan St. in downtown Lansing, according to John Truscott, of public relations firm Truscott Rossman, which represents the Boji Group.

Crews will power spray the surface of the tower's clock, returning its limestone facade to its original finish. They'll also apply a new coat of paint to "give it a little fresher appearance," Truscott said.

"They do this basic maintenance every seven to 10 years," he said. "It's some cleaning, some tuckpointing in the joints, painting everything that needs to be painted."

Maintenance work began about two weeks ago and is expected to finish this week.

The 25-story Boji Tower was built in 1929 by Ransom E. Olds, founder of Oldsmobile. The building was known as Michigan National Bank Tower from 1954 to 2001. The Boji Group purchased the building in 1998 and renamed it in 2005.

In 2005, the 250,000-square-foot Boji Tower was added to the National Register of Historic Places.